Does the Radian Weapons AX556 Billet work with the Knights Armament CQB Mod 2 11.5" Urx 4?
Lower Receiver
Radian Weapons AX556 Billet
from $514.95
Upper Receiver
Knights Armament CQB Mod 2 11.5" Urx 4 M-LOK
from $1962.99
Radian lower and Knights Armament upper compatibility
Yes, they fit
The Radian Weapons AX556 Billet works with the Knights Armament CQB Mod 2 11.5" Urx 4 M-LOK. Our compatibility rules found no conflict between them.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
Radian Weapons AX556 Billet vs Knights Armament CQB Mod 2: specs and prices
| Radian Weapons AX556 Billet | Knights Armament CQB Mod 2 | |
|---|---|---|
| Best price | $514.95 at Brownells | $1962.99 at BattleHawk Armory |
| Stores | 6 of 9 in stock | 0 of 2 in stock |
| Assembly | Stripped | Stripped |
| Platform | AR-15 | AR-15 |
| Caliber | Multi | 5.56 NATO |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
| Color | Black | n/a |
| Length | n/a | 11.5 |
Both for $2477.94 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Price history, last 90 days
- Radian Weapons AX556 Billet: lowest $514.95 on Jul 5, highest $533.99 on Sep 12 over the last 90 days.
- Knights Armament CQB Mod 2 11.5" Urx 4: lowest $1962.99 on Jul 5, highest $2099.99 on Jul 6 over the last 90 days.